Implementation of all-optical 3-dB and 10-dB directional coupler for switching applications

Swarnakar, Sandip; Noonepalle, Haripriya; Raju, Karyabhattu Seeta Rama; Ramarao, G.; Ramamurthy, Nallagarla; Kumar, Santosh

doi:10.1007/s11107-023-00995-1

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…It was reduced by half compared to the previous structure. It seems as a good result compared with some work of literature [23][24][25][26][27].…”

Section: Improved Directional Coupler Designsupporting

confidence: 57%

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Chergui,

Labbani

2023

Preprint

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In this paper, a novel method to diminish the coupling length and enhance the coupling coefficient in a two-dimensional (2D) photonic crystal (PC) directional coupler (DC)is investigated. The DC comprises two closely spaced linear waveguides separated by one row of silicon columns. In this new approach, we used core/shell (C/S) rods between the waveguides to reduce the coupling length. The C/S rod is obtained by etching a hole in the middle of the silicon rod. This modification leads to a very short coupling length of 5a, where a is the lattice constant of the structure. Simulation results show that increasing the inner core radius increases the coupling coefficient. The coupling properties have been numerically simulated and analyzed using the finite difference time domain (FDTD) and the plane-wave expansion (PWE) methods. Based on the modified structure, we analyzed the output spectrum of a very compact channel drop filter. The proposed modified design would offer significant potential for novel ultrasmall devices based on photonic crystal couplers.

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“…It was reduced by half compared to the previous structure. It seems as a good result compared with some work of literature [23][24][25][26][27].…”

Section: Improved Directional Coupler Designsupporting

confidence: 57%

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Chergui,

Labbani

2023

Preprint

View full text Add to dashboard Cite

show abstract

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Chergui,

Labbani

2023

Silicon

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In this paper, a novel method to diminish the coupling length and enhance the coupling coe cient in a two-dimensional (2D) photonic crystal (PC) directional coupler (DC)is investigated. The DC comprises two closely spaced linear waveguides separated by one row of silicon columns. In this new approach, we used core/shell (C/S) rods between the waveguides to reduce the coupling length. The C/S rod is obtained by etching a hole in the middle of the silicon rod. This modi cation leads to a very short coupling length of 5a, where a is the lattice constant of the structure. Simulation results show that increasing the inner core radius increases the coupling coe cient. The coupling properties have been numerically simulated and analyzed using the nite difference time domain (FDTD) and the plane-wave expansion (PWE) methods. Based on the modi ed structure, we analyzed the output spectrum of a very compact channel drop lter. The proposed modi ed design would offer signi cant potential for novel ultrasmall devices based on photonic crystal couplers.

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Mechanism and properties of all-optical switching constructed from 1D symmetric defect ring optical waveguide network

Hu,

Tang,

Yang

2024

Chinese Journal of Physics

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Implementation of all-optical 3-dB and 10-dB directional coupler for switching applications

Cited by 3 publications

References 29 publications

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Mechanism and properties of all-optical switching constructed from 1D symmetric defect ring optical waveguide network

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